Pith Number

pith:BD5UJHGQ

pith:2015:BD5UJHGQVURXZRUHPZXKLDYVFE

not attested not anchored not stored refs pending

Loo.py: From Fortran to performance via transformation and substitution rules

Andreas Kl\"ockner

arxiv:1503.07659 v2 · 2015-03-26 · cs.PL · cs.CE · cs.MS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BD5UJHGQVURXZRUHPZXKLDYVFE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:07:26.345656Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08fb449cd0ad237cc6877e6ea58f152923c9ab9f00e73c6492eef9d02f1c8ad0

Aliases

arxiv: 1503.07659 · arxiv_version: 1503.07659v2 · doi: 10.48550/arxiv.1503.07659 · pith_short_12: BD5UJHGQVURX · pith_short_16: BD5UJHGQVURXZRUH · pith_short_8: BD5UJHGQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/BD5UJHGQVURXZRUHPZXKLDYVFE \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 08fb449cd0ad237cc6877e6ea58f152923c9ab9f00e73c6492eef9d02f1c8ad0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ea2f881bca02d4617a495f116e85e547d7cd711ddff6c60f5fb87a906f93573",
    "cross_cats_sorted": [
      "cs.CE",
      "cs.MS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2015-03-26T09:40:56Z",
    "title_canon_sha256": "7380c6427a166dc1279a008b8c7f6b74817632e117ebdcee4fc0351fcb27ec99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.07659",
    "kind": "arxiv",
    "version": 2
  }
}